what the hell is a nug i keep hearin people say it but i dunno what it means. im good on most other words its just this one i got trouble with.
1 Improper use of contact lenses or steroid eyedrops can lead to fungal infections, which in turn can cause corneal ulcers. Also, a corneal injury that results in plant material getting into the eye can lead to fungal keratitis.  Acanthamoeba are microscopic, single-celled amoeba that can cause human infection.
Causes of watery eyes can include: 1  Dry Eye Syndrome. 2  Clogged tear ducts. 3  Conjunctivitis. 4  Environmental irritants such as chemicals, smog, hot wind, bright lights, blowing dust, and airborne allergens. 5  Blepharitis. 6  Abrasions. 7  Foreign bodies. 8  Allergies to mold, dust, and dander.